As part of the Duo enrollment process, you need to select which device you are going to use to receive codes from Duo. You can add additional devices to your Duo account once you have completed your initial enrollment.
See instructions to Manage Your Devices.
Duo authentication can be used with landline phones, mobile phones with data, tablets that are assigned a mobile phone number, and hardware tokens.
Duo provides the following two-factor authentication options:
- Duo mobile application - Duo Push
- Phone callback to your mobile, desk, or landline phone (caller will show as 603.646.2999)
- Tokens (which can be obtained at the Computer Store)
- Apple Touch ID (Chrome browser only)
No longer available due to security changes:
- SMS passcodes (via text message)
- Passcodes (via the Duo Mobile app)
When you try to authenticate to a system using Duo, the list of devices you previously registered with Duo appears. Select which phone you want to use, and that phone will either ring or have an approval request pushed to it. Either approve the request on the mobile phone, or answer the call and listen to the instructions to authenticate.
See the links below for information on using Duo Mobile on different devices: